Vendor main dependencies.

vendor/github.com/vulcand/oxy/forward/rewrite.go

@@ -0,0 +1,48 @@
+package forward
+
+import (
+	"net"
+	"net/http"
+	"strings"
+
+	"github.com/vulcand/oxy/utils"
+)
+
+// Rewriter is responsible for removing hop-by-hop headers and setting forwarding headers
+type HeaderRewriter struct {
+	TrustForwardHeader bool
+	Hostname           string
+}
+
+func (rw *HeaderRewriter) Rewrite(req *http.Request) {
+	if clientIP, _, err := net.SplitHostPort(req.RemoteAddr); err == nil {
+		if rw.TrustForwardHeader {
+			if prior, ok := req.Header[XForwardedFor]; ok {
+				clientIP = strings.Join(prior, ", ") + ", " + clientIP
+			}
+		}
+		req.Header.Set(XForwardedFor, clientIP)
+	}
+
+	if xfp := req.Header.Get(XForwardedProto); xfp != "" && rw.TrustForwardHeader {
+		req.Header.Set(XForwardedProto, xfp)
+	} else if req.TLS != nil {
+		req.Header.Set(XForwardedProto, "https")
+	} else {
+		req.Header.Set(XForwardedProto, "http")
+	}
+
+	if xfh := req.Header.Get(XForwardedHost); xfh != "" && rw.TrustForwardHeader {
+		req.Header.Set(XForwardedHost, xfh)
+	} else if req.Host != "" {
+		req.Header.Set(XForwardedHost, req.Host)
+	}
+
+	if rw.Hostname != "" {
+		req.Header.Set(XForwardedServer, rw.Hostname)
+	}
+
+	// Remove hop-by-hop headers to the backend.  Especially important is "Connection" because we want a persistent
+	// connection, regardless of what the client sent to us.
+	utils.RemoveHeaders(req.Header, HopHeaders...)
+}